body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1em;
    min-height: 100vh;
    font-size: 2em;
}

.toggle-container {
    position: relative;
    border-radius: 3.125em;
    width: 3.25em;
    height: 1.875em;
}

.toggle-checkbox {
    -webkit-appearance: none;
    appearance: none;
    position: absolute;
    z-index: 1;
    border-radius: inherit;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.toggle-track {
    display: flex;
    align-items: center;
    position: relative;
    border-radius: inherit;
    padding: 0.25em;
    width: 100%;
    height: 100%;
    background-color: #aeaeae;
    box-shadow: inset 0 0.0625em 0.125em rgba(0, 0, 0, 0.2);
    transition: background-color 0.4s linear;
}

.toggle-container.green > .toggle-checkbox:checked + .toggle-track {
    background-color: #4ccf59;
}

.toggle-container.blue > .toggle-checkbox:checked + .toggle-track {
    background-color: #3384fb;
}

.toggle-container.boo > .toggle-checkbox:checked + .toggle-track {
    background-color: #ff3372;
}

.toggle-thumb {
    position: relative;
    border-radius: 0.6875em;
    transform-origin: left;
    width: 1.375em;
    height: 1.375em;
    background-color: #fff;
    box-shadow: 0 0.25em 0.25em rgba(0, 0, 0, 0.2), inset 0 -0.125em 0.25em rgba(0, 0, 0, 0.2);
}

.toggle-checkbox.toggled-once + .toggle-track > .toggle-thumb {
    animation-name: grow-out, bounce-out;
    animation-duration: 0.2s;
    animation-timing-function: cubic-bezier(0.75, 0, 1, 1), cubic-bezier(0, 0, 0.3, 1.5);
    animation-delay: 0s, 0.2s;
    animation-fill-mode: forwards;
}

.toggle-checkbox.toggled-once:checked + .toggle-track > .toggle-thumb {
    animation-name: grow-in, bounce-in;
}

.toggle-container.boo .toggle-thumb::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    border-radius: inherit;
    width: 100%;
    height: 100%;
    background-image: url("https://assets.codepen.io/4175254/boo-face.png");
    background-size: 63.6363636364% 54.5454545455%;
    background-position: center;
    background-repeat: no-repeat;
    box-shadow: inset 0 -0.125em 0.25em rgba(0, 0, 0, 0.2);
    image-rendering: pixelated;
    opacity: 0;
    transition: opacity 0.2s linear;
}

.toggle-container.boo > .toggle-checkbox:checked + .toggle-track > .toggle-thumb::after {
    opacity: 1;
}

@media (hover: hover) {
    .toggle-container.boo > .toggle-checkbox:hover + .toggle-track > .toggle-thumb::after {
        opacity: 1;
    }
}

@keyframes grow-in {
    0% {
        border-radius: 0.6875em;
        transform: translateX(0) scale(1);
    }
    100% {
        border-radius: 0.4448529412em / 0.9453125em;
        transform: translateX(0.5em) scale(1.5454545455, 0.7272727273);
    }
}

@keyframes bounce-in {
    0% {
        border-radius: 0.4448529412em / 0.9453125em;
        transform: translateX(0.5em) scale(1.5454545455, 0.7272727273);
    }
    100% {
        border-radius: 0.6875em;
        transform: translateX(100%) scale(1);
    }
}

@keyframes grow-out {
    0% {
        border-radius: 0.6875em;
        transform: translateX(100%) scale(1);
    }
    100% {
        border-radius: 0.4448529412em / 0.9453125em;
        transform: translateX(0.125em) scale(1.5454545455, 0.7272727273);
    }
}

@keyframes bounce-out {
    0% {
        border-radius: 0.4448529412em / 0.9453125em;
        transform: translateX(0.125em) scale(1.5454545455, 0.7272727273);
    }
    100% {
        border-radius: 0.6875em;
        transform: translateX(0) scale(1);
    }
}